Volume 98, Number 4, May 2012
|Number of page(s)||5|
|Published online||21 May 2012|
Topology-induced inverse phase transitions
Dipartimento di Fisica, Sapienza Universitá di Roma - P.le A. Moro 2, 00815, Rome, Italy, EU
2 MSKCC-Computational Biology Center - 1275 York Avenue, New York, USA
3 Politecnico di Torino - Corso Duca degli Abruzzi 24, 10129, Torino, Italy, EU
4 The Abdus Salam International Center for Theoretical Physics - Strada Costiera 11, 34014, Trieste, Italy, EU
Accepted: 18 April 2012
Inverse phase transitions are striking phenomena in which an apparently more ordered state gets disordered under cooling. This behavior can naturally emerge in tricritical systems on heterogeneous networks and it is strongly enhanced by the presence of disassortative degree correlations. We show it both analytically and numerically, providing also a microscopic interpretation of inverse transitions in terms of freezing of sparse subgraphs and coupling renormalization.
PACS: 05.70.Fh – Phase transitions: general studies / 64.60.De – Statistical mechanics of model systems (Ising model, Potts model, field-theory models, Monte Carlo techniques, etc.) / 89.75.Fb – Structures and organization in complex systems
© EPLA, 2012
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